Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:10 2012 Optimize a model with 237 rows, 101 columns and 474 nonzeros Presolve removed 38 rows and 6 columns Presolve time: 0.00s Presolved: 199 rows, 95 columns, 410 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 4.700000e+01, 149 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 47.00000 0 88 41.00000 47.00000 14.6% - 0s 0 0 45.50000 0 83 41.00000 45.50000 11.0% - 0s 0 0 45.21429 0 88 41.00000 45.21429 10.3% - 0s H 0 0 43.0000000 45.21429 5.15% - 0s 0 0 44.75000 0 74 43.00000 44.75000 4.07% - 0s 0 0 44.68750 0 95 43.00000 44.68750 3.92% - 0s 0 0 44.50000 0 89 43.00000 44.50000 3.49% - 0s 0 0 44.41026 0 94 43.00000 44.41026 3.28% - 0s 0 0 44.28788 0 94 43.00000 44.28788 3.00% - 0s 0 0 cutoff 0 43.00000 43.99996 2.33% - 0s Cutting planes: Gomory: 1 Zero half: 47 Explored 0 nodes (463 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.300000000000e+01, best bound 4.300000000000e+01, gap 0.0%